JPH08284183A - Concrete block and construction method for retaining wall using the block - Google Patents

Abstract

PURPOSE: To make it possible to reduce labor dramatically and construct a high retaining wall and shorten a construction period and enhance the strength of a joining area which demands for a maximum strength. CONSTITUTION: A straight wall block and a foundation block 2 are employed in the central part of an exterior wall wherein the straight wall block 1 is provided with openings 14 and 24 notched vertically. As for the construction method, the foundation concrete block 1 is installed along the front edge of a sole plate and the straight wall concrete block 2 is piled by an arbitrary number of stages while horizontal reinforcements 3 are being fixed. Vertical reinforcing bars 3 are inserted from the openings 14 and 24 of the concrete blocks 1 and 2. The opening 4 is closed with mortar. The horizontal reinforcing bars 3 are fixed in the sole plate. Ready-mixed concrete is arranged to flow into the concrete blocks thus piled up and the sole plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block and a method of constructing a retaining wall using the concrete block.

[0002]

2. Description of the Related Art Conventional standard concrete block 50
Is as shown in FIG. That is, two rectangular outer wall portions 51, 52 and several connecting portions 53 connecting the parallel outer walls 51, 52 are formed, and a cavity 54 for pouring fresh concrete is formed.

A conventional retaining wall construction using the concrete block 50 will be described with reference to FIG. First, Fig. 5 (I)
As shown in, the form 62 and the longitudinal reinforcing bars 63 are arranged on the bottom slab 61, and the ready-mixed concrete c is poured. When the bottom slab 61 is completed by hardening the concrete c, the concrete block 50 is lifted up to a height above the top of the longitudinal reinforcing bar 63, as shown in FIG. The concrete blocks 50 are piled up in multiple stages while passing the vertical reinforcing bars 63 through. When the concrete blocks 50 have been stacked, as shown in Fig. (III), the straight wall concrete blocks 50 are filled with ready-mixed concrete, and the straight walls 64 are spliced onto the bottom plate 61,
It was building an L-shaped retaining wall.

[0004]

However, in the conventional concrete block 50 and the retaining wall construction using the same,
There were the following problems. First, as shown in FIG. 5 (II), the concrete block has to be lifted and lowered to a high position as shown by an arrow d, which requires a lot of labor and a high retaining wall construction is impossible. Then, after the concrete of the bottom slab portion 61 hardens, the concrete block 50 of the straight wall portion is piled up, and the straight wall portion is filled with fresh concrete. It takes about 1 day for the concrete to harden, so the construction period is 3
It had the drawback of lasting more than a day. Furthermore, since the bottom slab portion 61 and the straight wall portion 64 are piecing joints, there is a problem that the adhesion strength between the two is weak even though it is the portion of the L-shaped retaining wall that requires the highest strength.

In view of the above-mentioned circumstances, the present invention is a concrete block in which the labor is significantly reduced, a high retaining wall can be constructed, the construction period is shortened, and the strength of the connection part requiring the most strength can be improved. And to provide a method of constructing a retaining wall using the same.

[0006]

The concrete blocks of the present invention include concrete blocks for straight walls and concrete blocks for foundations. Only the concrete blocks for straight walls are used, or the concrete blocks for straight walls and foundation concrete blocks are used. Used in combination. The concrete block for a straight wall is a concrete block in which two rectangular outer wall parts and a connecting part that connects two parallel outer wall parts are integrally formed, and one outer wall part In the central portion of the above, an opening cut out in the vertical direction is formed with a width that allows the vertical reinforcing bar to pass therethrough.
The concrete block for foundation is a concrete block in which two rectangular outer wall parts and a connecting part that connects between two outer wall parts arranged in parallel are integrally formed, and one of the outer wall parts It is characterized in that an opening having a size that allows fresh concrete to flow is formed in the central portion.
The building method of the present invention is (a) a block stacking step in which the foundation concrete block is installed along the front end edge of the bottom slab, and the straight wall concrete block is stacked on it with an arbitrary number of steps while fixing the transverse reinforcing bars. , (B) Reinforcing bar insertion step of inserting vertical reinforcing bars from the openings of the concrete block for foundation and the concrete block for straight walls and fixing to horizontal reinforcing bars, (c) Mortar or dedicated blockage of the openings for concrete for straight walls A closing step of closing with a member,
(d) It is characterized in that it comprises a concrete block in which raw concrete is piled up after the horizontal reinforcing bars are fixed in the bottom slab and a formwork is installed at the rear end of the bottom slab, and a concrete pouring process is poured into the bottom slab.

[0007]

In the concrete block of the present invention, since the longitudinal reinforcing bar can be inserted through the opening, it is not necessary to lift the concrete block to a high position beyond the end of the reinforcing bar, and the concrete blocks can be sequentially lifted to a height where they can be stacked. Therefore, the work of stacking blocks is reduced, and a high retaining wall can be constructed. In the construction method of the present invention, after stacking the concrete blocks and inserting the longitudinal reinforcing bars, it is sufficient to inject ready-mixed concrete into the straight wall portion and the bottom slab portion at the same time.
The connection part of the L-shaped retaining wall is finished in one piece, and can have high strength that is not comparable to that of a piecing joint. Moreover, since the concrete pouring can be done in one step, the construction period can be shortened.

[0008]

EXAMPLES Examples of the present invention will be described below. 1 is a side view, a plan view and a rear view of a straight wall concrete block according to an embodiment of the present invention, and FIG. 2 is a side view, a plan view and a rear view of a foundation concrete block according to an embodiment of the present invention. FIG. 3 is an explanatory view of the method for constructing a retaining wall according to the present invention, in which each step (I) to (III) is a side view of column (A),
Row (B) is a rear view.

The concrete block for straight walls 1 shown in FIG.
It is composed of a rectangular outer wall portion 11 and a connecting portion 13 that connects the inner wall portion 12, and these are integrally formed of concrete. The inner wall portion is formed with an opening 14 which is a notch in the vertical direction having a width required to pass the longitudinal reinforcing bar in the central portion thereof. Further, a cavity 15 into which fresh concrete is poured is formed between the side of the connecting portion 13 and between the two connecting portions 13.

The concrete block 2 for foundation shown in FIG.
It is composed of a rectangular parallelepiped outer wall portion 21 and an inner wall portion 22, and a connecting portion 23 that connects the outer wall portion 21 and the inner wall portion 22, and these are integrally formed of concrete. The inner wall portion 22 has an opening 24 formed in the central portion thereof for allowing ready-mixed concrete to flow therethrough. The shape of the opening 21 is not particularly limited, as long as it allows fresh concrete to flow, and various shapes can be adopted. In addition, the width dimension w of the two inner wall portions combined is smaller than the width dimension W of the outer wall portion 21, so that fresh concrete flow paths can be formed at both ends.

Next, the concrete blocks 1 and 2 are
A method of constructing a retaining wall using will be described with reference to FIG. First, as shown in FIG. 3 (I), the foundation block 2 is installed along the front end line of the bottom slab, and the straight wall block 1 is stacked on it. At this time, the straight wall block 1 need only be stacked on the block walls that have been stacked up to this point, and it is not necessary to lift it up high, so the labor is small. The block stacking work is performed while fixing the lateral reinforcing bars 3.

Next, as shown in FIG. 3 (II), the longitudinal reinforcing bars 4 are inserted into the stacked blocks 1 and 2 from the back side (inside) as shown by an arrow a. At this time, the vertical reinforcing bars 4 may be inserted after stacking the straight wall blocks 1 to the uppermost stage, and after stacking up to a certain number of steps, the vertical reinforcing bars 4 are inserted, and then the straight wall blocks having the remaining number of steps are inserted. 1
May be stacked. Also in this case, the straight wall block 1 is inserted in the horizontal direction as shown by the arrow b, and the vertical rebar 4 is inserted.
Do not interfere with each other through the opening 24, so that the work of stacking blocks can be performed without lifting it high. Thereafter, the opening 24 of the straight wall block 1 is filled with mortar or is closed with a dedicated closing member.

Finally, as shown in FIG. (III), the horizontal reinforcing bars 3 are fixed to the vertical reinforcing bars 4 in the bottom slab 5, and the form 6 is installed on the rear end edge of the bottom slab 5. Then, the fresh concrete c is poured from the upper surface of the bottom slab 5. After this, ready-mixed concrete c
When is hardened, the construction is complete. In the present invention, since the straight wall portion and the bottom slab portion 5 are simultaneously poured with the green concrete c, high strength can be imparted even to the connection portion which is integrally formed and requires the highest strength. Also, since the concrete pouring work only needs to be done once, the construction period can be shortened, and the conventional construction method, which required 3 days, can be completed in 2 days.

Although the above retaining wall was an L-shaped retaining wall,
If it is a retaining wall other than this, only the straight wall block 1, only the basic block 2, or the straight wall block 1 and the basic block 2 may be used in combination.

[0015]

EFFECTS OF THE INVENTION According to the present invention, the labor can be significantly reduced, a high retaining wall can be constructed, the construction period can be shortened, and the strength of the connection portion requiring the highest strength can be improved.

[Brief description of drawings]

FIG. 1 is a side view (A), a plan view (B) and a rear view (C) of a concrete block for straight walls according to an embodiment of the present invention.

FIG. 2 is a side view (A), a plan view (B) and a rear view (C) of a foundation concrete block according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a method of constructing a retaining wall according to the present invention.

FIG. 4 is a side view (A), a plan view (B) and a rear view (C) of a conventional concrete block.

FIG. 5 is an explanatory diagram of a conventional retaining wall construction method.

[Explanation of symbols]

1 Concrete blocks for straight walls 2 Concrete blocks for foundations 3 Horizontal reinforcing bars 4 Vertical reinforcing bars 5 Bottom plate part

Claims (3)

[Claims] 1. An outer wall portion of two rectangular parallelepipeds, which are arranged in parallel with each other.
A concrete block integrally formed with a connecting portion that connects between the outer wall portions of one sheet, and an opening cut vertically is formed in the central portion of one outer wall portion with a width that allows vertical rebar to pass through. A concrete block for straight walls that is characterized by being. 2. An outer wall portion of two rectangular parallelepipeds and a pair of outer wall portions arranged in parallel with each other.
It is a concrete block integrally formed with a connecting portion that connects between the outer wall portions of the sheet, characterized in that in the central portion of one outer wall portion, an opening of a size that allows fresh concrete to flow is formed. Concrete block for foundation to be. 3. A block stacking step of: (a) installing the concrete block for foundation along the front edge of a bottom slab, and stacking the concrete block for straight wall on it with an arbitrary number of stages while fixing transverse reinforcing bars; b) Reinforcing bar inserting step of inserting vertical reinforcing bars from the openings of the concrete block for foundation and the concrete block for straight walls and fixing to horizontal reinforcing bars, (c) using mortar or a dedicated closing member for the openings of the concrete for straight walls. Closing process to close, (d) consist of a concrete block in which ready-mixed concrete is piled up and concrete is poured into the bottom slab after fixing horizontal transverse reinforcing bars in the slab and installing a formwork at the rear end of the slab. Retaining wall construction method characterized by.